Sparktastic
New Member
Not sure if anyone else has noticed this but the Lifepo4 'User' battery charging algo is terrible on (cheaper) AIO's.
Not sure if the DEYE and SRNE are any better..
They typically have a Boost/Bulk charge voltage and a Float voltage - which is fine in theory..
However, the problem is, there's no way to adjust the re-boost/bulk voltage. I.e to trigger boost/bulk charging on a daily basis.
I've contacted MPP about this and their response was, that the charger won't activate boost/bulk charge mode until the battery voltage is so low that it would be around 20-30% SOC. How many off grid setups regularly let their battery voltage go this low?
The issue then, is that each day, the AIO only charges up to the float voltage. This would be fine if the battery were sitting in a constant float environment, but it's terrible if the batteries are being cycled.
The batteries can never fully charge and the BMS never has a chance to balance the cells near the top of the charging curve.
I've pretty much given up on using the Solar chargers in the AIO's.
Any others experienced this?
It could be fixed so easily by having an adjustable set point for the re 'boost/bulk activation voltage' and a 'boost duration', as they do in Victron and Epever MPPT chargers.
Not sure if the DEYE and SRNE are any better..
They typically have a Boost/Bulk charge voltage and a Float voltage - which is fine in theory..
However, the problem is, there's no way to adjust the re-boost/bulk voltage. I.e to trigger boost/bulk charging on a daily basis.
I've contacted MPP about this and their response was, that the charger won't activate boost/bulk charge mode until the battery voltage is so low that it would be around 20-30% SOC. How many off grid setups regularly let their battery voltage go this low?
The issue then, is that each day, the AIO only charges up to the float voltage. This would be fine if the battery were sitting in a constant float environment, but it's terrible if the batteries are being cycled.
The batteries can never fully charge and the BMS never has a chance to balance the cells near the top of the charging curve.
I've pretty much given up on using the Solar chargers in the AIO's.
Any others experienced this?
It could be fixed so easily by having an adjustable set point for the re 'boost/bulk activation voltage' and a 'boost duration', as they do in Victron and Epever MPPT chargers.
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